Look I concede to the point that this has negatively effected the box office, but not by a huge margin. Anyone who was already going to see the movie this weekend to begin with won't be put off by the shootings. I don't know a single person who says that the shootings even remotely affected their decision to turn out this weekend.
Granted I'm sure there are some out there but not enough to put a big, serious dent in the BO returns.
And until I see anyone around me skip out on going to the movie because of the tragedy, I'm sticking to that.